Foam dispensing nozzles and dispensers employing said nozzles
First Claim
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1. A foam dispensing nozzle for dispensing a final foam from an incoming intermediate foam, said nozzle comprising:
- (a) an inlet conduit for receiving the incoming intermediate foam from an initial foam refining means, the incoming intermediate foam consisting of a foamed mixture of a foamable liquid and a gas at an intermediate foam velocity;
(b) a final foam refining means for converting the intermediate foam into a final foam located in fluid communication with the inlet conduit and having a plurality of substantially uniformly-sized and evenly distributed passageways therethrough, the passageways having a dimension from about 0.020 mm to about 0.120 mm; and
(c) a velocity decreasing means for reducing the intermediate foam velocity to a velocity no greater than 300 cm/sec through the foam refining means, the velocity decreasing means being located between and in fluid communication with the inlet conduit and the foam refining means.
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Abstract
Foam dispensing nozzles and manually actuable foam dispensers for producing and dispensing improved foams made from a foamable liquid and gas. The foam dispensing nozzles include a velocity decreasing structure so that the average foam velocity through the foam refining apparatus does not exceed a certain value.
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Citations
10 Claims
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1. A foam dispensing nozzle for dispensing a final foam from an incoming intermediate foam, said nozzle comprising:
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(a) an inlet conduit for receiving the incoming intermediate foam from an initial foam refining means, the incoming intermediate foam consisting of a foamed mixture of a foamable liquid and a gas at an intermediate foam velocity; (b) a final foam refining means for converting the intermediate foam into a final foam located in fluid communication with the inlet conduit and having a plurality of substantially uniformly-sized and evenly distributed passageways therethrough, the passageways having a dimension from about 0.020 mm to about 0.120 mm; and (c) a velocity decreasing means for reducing the intermediate foam velocity to a velocity no greater than 300 cm/sec through the foam refining means, the velocity decreasing means being located between and in fluid communication with the inlet conduit and the foam refining means. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10)
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6. A pump foam dispenser for dispensing a final foam from an incoming intermediate foam, said dispenser comprising a reservoir to contain said foamable liquid, a manually-actuable means for generating a volume of a mixture of said foamable liquid and a gas, and a foam dispensing nozzle sealably attached in fluid communication with said manually-actuable means wherein the improvement comprises a nozzle comprising:
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(a) an inlet conduit for receiving the incoming intermediate foam from an initial foam refining means, the incoming intermediate foam consisting of a foamed mixture of a foamable liquid and a gas at an intermediate foam velocity; (b) a final foam refining means for converting the incoming intermediate foam into a final foam located in fluid communication with the inlet conduit and having a plurality of passageways therethrough, the passageways having a dimension from about 0.020 mm to about 0.120 mm; and (c) a velocity decreasing means for reducing the intermediate foam velocity to a velocity no greater than 300 cm/sec through the passageways of the foam refining means, the velocity decreasing means being located between and in fluid communication with the inlet conduit and the foam refining means.
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Specification